What is the name for black clothing worn by stage management during productions?

The term used for the black clothing worn by stage management during productions is "blacks." This clothing is specifically designed to minimize visibility in low-light settings, allowing stage managers and crew members to move around the stage and perform their duties without distracting the audience from the performance. Wearing black helps them blend into the background, which is crucial in maintaining the illusion of the show and ensuring that the focus remains on the actors and the performance itself.

In contrast, the other terms refer to different theatrical elements: a book flat is a type of set piece, a batten is a horizontal pipe used to hang lights or scenery, and burnout generally refers to a specific fabric finishing technique. Hence, "blacks" precisely describes the clothing used for stealth and professionalism during performances.